Pull-socket.



M. J. GRETSCH.

PULL SOCKET.

APPLICATION FILED MAY 2, i917. 1,29%,794B

2 SHEETS-SHEET I.

Patented Feb. 18, 1919.

M. J. GRETSCIL PULL SOCKET. pg E E APPHCATIUN FILED MAY 12; 19!!" u N 2 SHEETS -SHEEY fire Patented 1S, 1919.

MARK J. GREZSCH, 01* NEW YORK, Ni :21, ASSIGNGR, ZBY DIRECT AND MESNE AS$lGrl MENTS, ONE-HALE T0 VERA GRETSGBII ANI) ONE-HALF CEO I BOTH OF KEV] YORK, N. Y.

$313033?) LEVITUN,

PULL-SGCKET.

Specification of Letters Patent.

Application filed may 12, 1917. Serial no. 168,103.

To all 'LliZ-Oifl it may concern:

Be it known that 1, MARK J. GRETsoH, a citizen of the United States. and a resident of the borough of Manhattan, city and State of New York, have invented certain new and useful Improvements in Pull-lockets', of which the following is a description in such full, clear, and exact terms as will enable any person skilled in the art to which it pertains to make and use the same.

h'ly invention relates to an improvement in electric pull sockets i. (1 the sockets for incandescent lights or bulbs in which the circuit to and from the light is controlled by a mechanism operated by a pendant chain, one pull on which closes the circuit and lights the lump and another pull on which will break the circuit and extinguish the light.'

The object of the invention is to reduce these devices to the simplest possible form and allow their construction at a low cost. Such devices are necessarily complicated and have been proposed in innumerable forms. My invention is the result of pro longed study of the problem of constructing the parts so that they will be strong and certain of action and at the same time reducing the number of parts and simplifying their forms so that I can place upon the market a perfectly serviceable device at a lower cost than that heretofore offered. It is further an objectof the invention to produce all of the elements in an extremely strong and durable form so that they Wlll operate satisfactorily and stand up under continuous usage.

With these and other objects in view the invention resides in the improvements in the construction of the parts of the device and in their combination with each other which will be fully set forth hereinafter and particularly pointedout in the claims.

Reference is had to the accompanying drawings which represent as an example the preferred embodiment of my invention.

In these drawings- Figure l is a side view of the lamp socket with a part broken away.

Fig. 2 is a sectional elevation on the line 2-2 of Fig. 1, but the main portions of tho porcclains or insulators and the parts con taincd therein being leftin elevation.

lug. 3 a plan view of the device with the metal shell removed, showing the chain trumpet in place.

r 1g. 4' ism bottom plan view of the same parts, thc sheet metal shell or casing being removed but the chain trumpetappearing as avell as the threaded sleeve which receives the incandescent lightbulb.

F1g. IS a section on the line 55 of Fig. 3. 1

F 1g. 6 18 a sectional elevation on the line t e of Fig. 5.

Fig. 7 is a detail section on the line '?7 of Fig. 4 particularly showin theconnection to the center contact of t e bulb.

Fig. 8 is a cross-section on. the line 8-8 of Fig. 4.

Fig. 9 is an enlarged bottom plan view of the top porcelain section showing the coin nmtator. pull chain arm, arbor and the appurtenant parts in position.

Fig. 10 is a top plan .view of the bottom section of the. porcelain.

Fig. 11 is a detail )erspective of the bean lug stud for the arior which stud is attached to the upper porcelain sectin.

Fig. 1). is an enlarged end View of the arbor.

13 is a side view of .the'arbor. F g. 1- an elevational view of the pull chain arm showing the ratchet plate thereon.

a section on the line ilk-16 of and Fig. 23 is a bottom plan of the upper shell section showing the complementary locking devices. I

My improved pull socket is incased in a brass or other shell formed of a cylindric body or lower part 25 and a cap of upper" part 213. These parts and 26 are separably connected as shown in Figs. 1, 2, 21, 22

I 22 are detail elevations of the locking devices ot the lower shell section,

ill

till

incense the bracket arm 39, is bent laterally and sin gaged with the crank arm all so that the arm is thus held as shown in Fig. 6 and when thrown by the pull chain to is, upon the release of said chain, returned to the position shown in Fig. 6 by the spring 42. The pull chain 45 is the characteristic chain of these devices and passes outside of the socket so as to hang pendant there from through a trumpet l This trumpet has a base plate. l? to which it is attached and the same is seated in a cavity 31 in the side of the upper porcelain section 31, the same being an extension of the cavities in the porcelain section provided for the reception of the crank arm 4-l and commutator to be hereinafter described, When the sheet metal sections and 26 are engaged and locked by their bayonet joint connections above mentioned, said sections lie over the base plate t? and hold the base plate and trumpet securely in position. The base plate lies fiat againstthe upper porcelain section 31 but has at its upper and lower edges indent portions which enter the aforesaid cavity 31 the lower indent portion lying on top of the porcelain section 32 and the upper indent part of the base plate lying against the top wall of the above mentioned recess 31 in said porcelain section 31. The trumpet es projects through the opening 25 in the shell section The pull chain i5 as best shown in Figs. 14: and 15 is engaged with the crank arm let by means of a recess in the crank in which one or the ball links of the pull chain as is seated. A. downward pull on. the chain 4-5 therefore throws the arm from the horizontal position shown in Figs. 6 and 9 upward. to a substantially vertical position which throw is transmitted in a rotary motion (to the arbor 41, through the ratchet device hereinafter described, and is suificient to either make or brcal: the circuit of the lamp and when the pressure. on the chain 4:5 is relaxed the spring -32 throws the crank arm back to its position of rest which is that indicated in Figs. 6 and 8.

As best shown in Figs. 14, 15 and 16 the crank arm it has the ratchet device tastened thereto which is formed of a metal plate 48 having our ratchet teeth a8 struck up therefrom and which plate is laid sidewise on the crank arm 44 and fastened thereto preferably by a boss 48' which enters the central opening in the arm al and also by lapping the edges 48 oi the tact device is shown in detail in 1'? to 20 and it comprises a body l9 of fiber or other approved insulation material with a squared central orifice it) to receive the squaredportion ll of the arbor i1. This insulation body 49 is sheathed with a metal covering 50 on one side thereof which is extended to form teeth 50* on two opposite oi the four teeth $9 of the commutator so that the commutator, having four teeth :9, has two of said teeth shed with the metal 50 and two of the teeth unshod, the first pair of teeth transmitting the current and the second pair, of teeth being uncovered insulation therefore not transmitting the current. inutator has indentations 50 next to its teeth 5O there being two of such indentations rcspectively' corresponding to the two teeth so that the commutatordevice lying as it does, along side of the crank arm at, with its attachments matched together to form a ratchet movement according to the operationv of which the back and forth movement of the arm el-limparts to the connnutator device a step by step forward rotation.

New referring to Fig. 8 it will be noted that the teeth of the ratchet 49 in the course of rotation thereof are adapted to project successively into an opening 82* made in the bottom of the insulating section 32 and in cooperation with the right hand End Wall of said opening, which forms an abutment will prevent a retrograde movement of the ratchet, so that as the back and forth movement of the crank arm 4.4 imparts aprogressive step by step movement to the commutator 4:9 the latter will at each quarter of rotation thereof be engaged by the said abutment and held in place until the next motion is imparted to it. The engagement of the teeth with the said aliutment is rendered possible by reason of the wahhling lateral support of the arbor it As the ratchet is rotated in clock wise direction the cam shaped surfaces of the teeth thereof in sliding over the bottom of the section 32 will first raise the arbor 41 against the tension of the spring 43 and on the tooth entering the. opening 32 the arlqor ll will be pressed downwardly by the said spring causing the tooth to engage the right hand end wall or" said opening which as stated will form an abutment and revent the retrograde movement of the rate et.

It will be seen that current is transmitted lirom'the arbor :1 to the ratchet plate 48 of the crank arm is and thence to the sheathing 50 or the commutator 49 and thence to. a contact finger 51 which extends through an opening 355 in the insulation section 32 and is part of a metal plate 51 which is fastened to the under side of the insulation section 32 by the bel ttl But it should be noted that this plate 51 engages the bottom surface of a flange 35 formed. on the screw socket 35 so that itmakcs electrical contact The metal covering 50 of the comtherewith and carries the current to the threaded side shell of the incandescent light.

The incandescent light therefore is screwed into the metal socket 35 and makes contact a therewith on one point or" its circuit while the other point 'makes contact with the center contact 36 before described thus conipleting the circuit in the lamp. The circuit to the lamp passes from the wire 29 to the to bracket arm 39, thence to-the arbor i1 and from it to the sheathing 50 and from the sheathing to the tongue 51 and thence to the threaded socket 35 returning from the central contact of the electric lamp to the 35' tongue 36 and thence out to the wire 29 through the connections shown in Fig. 7 and above desc 'ihed.

In summary, therefore, it will he seen that upon a downward pull on the pendant chain acts the crank arm 44 is thrown over from the horizontal position shown in Fig. 8 to a vertical position, and that the ratchet teeth 4C8 and corresponding formation 50 of the sheathing 50 of the commutator 49 will re sult in a one-quarter revolution of the cominutator and the return of the arm 4% to the horizontal position shown in Fig. 8.

Repeated movements or this kind will resuit in a continued step by step progressive 9o rotation of the commutator and in an alternate engagement and disengagement of the.

sheathing of the commutator with and from the finger '51 thus carrying the current to the socket 35 and igniting or extinguishing so the lamp as the case may he.

'While the invention here/shown is especially designed in all or" its principles to what are known as pull sockets,'z'. e: those sockets operated by a. chain, nevertheless so certain features are necessarily useful in connection with what are known as key sockets and indeed any form oif'lanip socket and it sho'uldhe understood that the patent is not necessarily limitedto any particular type of to socket.

What I claim is 1. A. lamp socket having an insulation section formed with a recess and is ratchet shaped commutator rotataloly supported in to said socket and adapted to at times enter with a teeth into said recess and engage the wall thereof? which lies in its path so as to become locked therein against retrograde movement. y

2. A. lamp socket having an insulation section termed in its hottcrn with a recess, a ratchet shaped commutator revolving in said 1 socket and capable of yielding at a right angle to the bottom oi": section and co enter with a said. recess so as to v he looked against retrograde movement.

3. A lamp socket having an insulation sec formed with'a recess in its bottom, a v arhor in said socket, oped commutator on arbor,

the teeth of which are adapted to successively enter the said recess so as to lock said commutator against retrograde movement e. A lamp socket having a sectional'insulatator and means on the qomniutator for making and breaking the lamp circuit.

,5. A lamp socket having an insulation frame part with a recess therein, a conducting cylindrical part to receive the lamp and to take the current to the side thereof, an

arbor mounted in the frame part, means for leading the current to the arbor, contact devices coacting with the arbor to make and break the connection with said cylindrical part and having teeth adapted at times to enter said recess to prevent retrograde movement of said contact device and means for returning; the circuit from the central contact of the lamp. i

6. A lamp socket having a toothed make and break commutator device, manually operated means for. operating the same, a circuit completing device to carry the current from the commutator device to the side of the lamp, a constantly connected conducting device for taking the current-from the central contact thereof and stationary means to at times engage the teeth of the said com mutator devices to prevent retrograde moveroent thereof.

7. A lamp socket having an insulation frame work having a recess, a bracket arm thereon to carry the current, an arbor having a hearing in the bracket arm and also receivihg the current therefrom and toothed make and break devices for controlling the move ment of the current from the arbor to the lamp and adapted during'rotation to snap with a tooth into said recess to prevent retrograde movement.

8. A lamp socket having". an insulation frame work having a recess, a bracket arm therein adapted to carry the current, an arhor having one end mounted in the hearing in the bracket arm and receiving the current therefrom, the other end of the arbor being laterally movable, a spring pressing the other end of said arhor laterally and ratchet shaped make and break contact device on arhor and adapted at times with a. tooth said recess to prevent a do movement.

9. A lamp socket having an insulation 0 neworh having a. recess, a hracket arm thereinadapted to carry the current, an at or having one end mounted in the bearing in the bracket arm and receiving the current therefrom, the other end of the arbor being laterally movable, a spring pressing the other end of said arbor laterally and.

ratchet shaped make and break contact devices mounted on the arbor and adapted at tending through the" frame Work and engagin the cylinder, a contact finger to engage the central contact of the lamp, means Y mounting the contact finger on the insulation frame work and for taking the current to or from. said finger, a second contact finger in connection with the said conducting cylinder, the second contact finger projecting into the interior of the frame work and a toothed nism in said frame work enacting with said contact finger and adapted at times to enter with a tooth said recess to prevent retrograde movement of said mechanism.

,11. A lamp socket having an insulation -finger projecting into make and break ratchet mechaframe work, conducting cylinder to receive the lamp, a fastening extending through the frame work and engaging the cylinder, a contact finger to engage the central contact of the lamp, means mounting the contact finger on the insulation frame work and for taking the current to or from said finger, a second contact finger in connection with the said conducting cylinder, the second contact the interior of the frame work and a make and break ratchet mechanism in said frame work coacting with said contact finger, said make and break con.-

tact mechanism comprising a wabbling arbor and a ratchet commutator mechanism thereon, the ratchet commutator mechanism coacting with a stationary abutment on the frame work whereby the rotation of the ratchet brings about a laterally wabbling of the arbor.

In testimony whereof I have hereunto signed my name in the presence of two witnesses.

Witnesses.

PATRICK A. BOLGER, ETHEL S. Hncrms.

MARK J. ean'rson. 

